Comparative Electromagnetic Evaluation of Different Structures of Switched Reluctance Motors

This paper evaluates the performance characteristics and comparison results of four different types of switched reluctance motors. These motors have 12/10, 6/4, 12/8, and 8/8(or isolated phase) configurations. The 6/4 configuration includes, a motor with one tooth per stator pole, where as in 12/10 arrangement, there are two teeth per stator pole. In 12/8 arrangement, a motor is of the cylindrical type with one tooth per stator pole and the other one is of the isolated phase geometry where each phase consist of eight rotor and stator poles. The areas of all stator pole faces jointly involving in torque production mechanism in the motors are taken to be equal. The numerical analysis gives a better understanding of the flux distribution inside the motors and can be used to compute, optimize motor performance and parameters. The terminal inductance per phase, the flux linkage of each stator pole winding, and the components of leakage inductances are determined and plotted for different rotor positions and excitation currents. Finally the static torque for different forced current levels and rotor positions are also presented for each motor. Copyright (c) 2012 Praise Worthy PrizeS.r.l. - All rights reserved.